We get a lot of recurring questions where newcomers ask for advice on what boards to buy. Rather than cluttering up the main keyboards or new members forum, having a sub-forum under one of those dedicated to asking those questions could be immensely helpful.
We could also have a sticky topic that would serve as a questionnaire for people to provide answers to, things like tactility/switch type, backlighting, form factor, color, keycap material, etc...